traction fiber

例句：

1. 1. The car's traction is poor on the wet road.
   这辆车在湿滑的路面上牵引力不足。
2. 2. The train needs more traction to accelerate.
   火车需要更多的牵引力来加速。
3. 3.The heavy load required extra traction to move.
   沉重的负载需要额外的牵引力才能移动。